Toilet seat accessory



FIG. 1 is a perspective view taken from the top, rear and left side of a toilet seat accessory showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a toilet seat accessory, substantially as shown. 